<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>GrADS runs as a single process on a single core. There is no multi-anything in GrADS at this point. </div><div>I have never done any benchmarking for 32-bit vs. 64-bit operating systems. </div><div><br></div><div>John Huddleston (who is mysteriously unable to reply to gradsusr posts) has this to offer: </div><div><br></div><div><blockquote type="cite"><div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><span class="Apple-style-span" style="color: rgb(31, 73, 125); font-family: Calibri, sans-serif; font-size: 15px; ">I am forwarding our analysis of creating GrADS images of NASA satellite data using a 32 bit Ubuntu 8.04 server.</span></div></div><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div lang="EN-US" link="blue" vlink="purple"><div class="Section1"><div style="margin-top: 0in; margin-right: 0in; margin-bottom: 0.0001pt; margin-left: 0in; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125); "><o:p> </o:p></span></div></div></div></span></blockquote></div></body></html>